Bach 1½C vs Conn Precision 1
The Bach 1½C has a wider cup diameter, the Conn Precision 1 features a deeper cup.
The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.
Mouthpiece A
Bach 1½C
• Cornet
Rim width—
vs
Mouthpiece B
Conn Precision 1
• Cornet
GeneralRim width—
Best suited for
All-around players; comfortable wide rim
Full round tone; suited to low notes
Which is better?
Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.